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W. G. vT1.\ -U0 KE. CHEMICAL TELEGRAPH.

Patented Apr, 11

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VILHELM G. TAUCKE, OF NEW YORK, N. Y.

CHEMICAL TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 256,253, dated April 11, 1882.

Application filed August 20,1881. '(No model.)

' To all whom it may concern:

Beit known that I, W1LEELM OHm-TAUoKE, of the city, county, and State of New York, have invented certain new and useful Improvements in Electro-Ghemical Telegraphs, of which the following is a specification.

This invention relates to improvements in electrochemical or copying telegraphs, based on the principle of the well-known Oaselli- Pan telegraph, but simplified in such a manner that not only common paper and ink, in place of metallic foil, may be used for writing the messages, but, furthermore, the construction essentially simplified without, however, impairing the synchronism of the instruments at the transmitting and receiving stations.

This invention embraces a rotary cylinder for the transmitting or receiving'pa-per, a reciprocating stylus traversing the cylinder in line ofits axis, and mechanism whereby a slow step-by-step motion is imparted to the cylinder and a rapid reciprocating motion to the'stylus, the movements of the cylinder being intermittentbetween the strokes of the stylus- By this meansacomparatively-rapid copying-telegraph is produced. A conical pendulum is used for synchronizing the instruments at the transmitting and receiving stations. v

In the accompanying drawings, Figure 1 represents a side elevation, partly in section, of my improved electrochemical or copying telegraph. Fig. 2 is a plan View, partly in horizontal section, on linexzc, Fig. 1. Figs. 3, 4, 5, and 6 are details of the apparatus, and Fig. 7 is a diagram showing the connection'of the apparatus with the main battery and line.

Similar letters of reference indicate corresponding parts.

The shaft of the horizontal cylinderAis supported in suitable bearings of the frame of the apparatus. To the cylinder A an axial motion is imparted by means of finely-toothed gearwheels a (millimeter-wheels) atboth ends ofthe cylindeigwhich mesh with minutely -toothed pinions I), placed on a shaft that revolves in suitable bearings sidewise ofor below the axis of the cylinder A. ,The shaft bof the pinion's b receivesinteimittent motion from a horizontal disk, d, having projecting teeth (1 at diametrically-opposite points of the disk, said teeth I engaging a gear-wheel, b, at the outer end of the pinion-shaft b. .The horizontal disk dis keyed to a vertical main shaft, 0, which turns in a step and neck bearing of theframe of the apparatus. To the main shaft 0 continuous rotary motion isimparted by bevel-gear wheels operated by a drum, cord, and. weight, said drum being wound up by means of a treadle', or by any other suitable means.

Above the horizontal cylinderAis arranged a point or stylus, B, the socket of which is guided in horizontal rails B vertically above and parallel to the axis of the cylinder. The stylus B is kept by a spiral spring in contact with the surface of the cylinder and guided in a socket the shank of which is applied to a horizontal connecting-rod, B to which reciprocating motion is imparted either by acrank of the main shaft 0, which crank is connected to the opposite end of the rod B as shown in Fig. 6, or by a disk, 6 which engages by a fixed stud, e, a cross-shaped guide-piece e of the rod B as shown in Figs. 1,2, and 3.

For the purpose of keeping up the regular motion of the apparatus and preserving the synchronism of the apparatus at the transmitting and receiving stations, I preferably em ploy a regulating apparatus similar to that used in the Hughes type-printing telegraph. It consists of a weighted pendulum,f, which is suspended from avertical standarthf, and

connected at its lower end by a pivot-liuk,f to a crank-arn1,f of the main shaft 0, the crank-arm being arranged above a horizontal fly-wheel. The pivot-link f is pivoted to the outer end of the crank-arm f and connected thereto by a spring the tension of which is adjustable in any suitable manner. A brakeblock,f at the outer end of the crank-arm f I 'iskept by the centrifugal motion of the pendulum in frictional contact with the circumferential flange of a fixed disk,f as shown in Figs. 1 and 4. v

The adjustment of the weight in connection with the brake regulatesthespeed of the main shaft and keeps up the uniform motion of the cylinder and stylus at one station. The same regulating device at the other station imparts .synchronous movement to the receiving cylinshaft moves the cylinder for the distance of two teeth, and carries the stylus forward and back over the surface of the cylinder. The stylus B is lifted away from the cylinder when arriving at either end of its motion by a slight raise at each end of the guide-rails, as shown in Fig. 1.

For transmitting messages common paper may be used, upon which the messageis written with any writing-ink,which, however, is preferably mixed with gum, dextrine, or other thickening substance to give it body. When common paper is used it has to be moistened when laying it on the cylinder, which, however,is not necessary when tin-foil is employed as the transmitting medium. The paper at the receiving-station may be in the shape of a continuous roll, which is prepared in the wellknown manner with iodide of potassium and starch, the iodide of potassium appearing in bluish color by the influence of the electric current, so as to reproduce thereby the transmitted characters in the manner well known in chemical telegraphs.

If desired, the messages at the transmittingstation may also be connected and arranged on a roll, in which case it is to be guided to the cylinder by means of rollers to which a synchronous step-by-step motion is imparted. Whenever the stylus passes over the writingink the current is thrown into the line and a corresponding mark produced upon the paper at the receiving-station. As the stylus passes over the paper in one direction it intersects all the writing thereon. In its return motion it intersects the writing again, closely to its former path, owing to the light forward mo tion which the cylinder has received. The parallel intersectingof the message by the contact of the stylus is repeated until the stylus has passed over the whole messa e, which is simultaneously reproduced by the chemical action of the current on the paper at the receiving-station.

I am aware that the mechanical means employed for operating the cylinder and stylus The advantages of my apparatus consist, first, in the high speed of the same, as with each full revolution of the pendulum two motions of the stylus are produced; second, in

the facility of keeping up the regular motion of the apparatus by the regulating-pendulum, so that the apparatus can be worked continuously for a considerable length of time without interruption; third, in the simplicity and cheapness of its construction, as compared to electrochemical and type-printing telegraphs heretofore employed.

Having thus described my invention,1 claim as new and desire to secure by Letters Patent- 1. The combination of arapid reoiprocatory stylus, a rotary cylinder, mechanism for imparting an intermittent motion to the cylinder between the strokes of the stylus, a motor, an intermediate vertical driving-shaft between the motor and cylinder, and a conical pendulum connected to the upper end of said vertical shaft, substantially as described.

2. The combination of a rotary cylinder, a

rapid reciprocatory stylus, and means for raising the stylus outof contact with the cylinder at each end of its stroke, substantially as described.

3. The combination of a rotary cylinder, a rapid reoiprocatory stylus, mechanism whereby the cylinder is rotated step by step between the strokes of the stylus, and means for raising the stylus out of contact with the cylinder at each end of its stroke, substantially asdescribed.

at. The combinationof the rotary cylinderA, gear a, shaft 1), pinion 1), gear b disk d, with teeth (1, vertical shaft 0, with balance-wheel and regulator, connecting-rod B stylus B, and guide therefor, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 8th day of August, 1881.

WILHELM one. TAUOKE.

Witnesses:

PAUL GOEPEL, CARL KARP. 

